The invention pertains to a method for producing a rotor unit or a bearing unit, wherein the rotor unit or bearing unit is respectively realized with a rotor or a bearing housing and a plain bearing bush (20) for the rotatable arrangement of the rotor on a spindle, wherein the plain bearing bush is placed into a mould (21), wherein the rotor or the bearing housing is respectively produced by attaching a polymeric material to the plain bearing bush in the mould by means of a transfer moulding process or injection moulding process, wherein the plain bearing bush is composed of a first bush section (25) and a second bush section (26) that is connected to the first bush section, wherein the bush sections are placed into the mould, and wherein the polymeric material is attached to the bush sections.

A composite yoke includes a plurality of packs of unidirectional plies and at least one pack of chopped fibers disposed between two adjacent packs of unidirectional plies. A method of manufacturing a composite yoke includes arranging a plurality of plies of unidirectional fibers to form a first pack of unidirectional plies, arranging a layer of chopped fibers on the first pack of unidirectional plies, arranging a plurality of plies of unidirectional fibers on to form a second pack of unidirectional plies on the layer of chopped fibers, curing the composite yoke to form a cured composite yoke, and cutting excess material from the first pack of unidirectional plies, the layer of chopped fibers, and the second pack of unidirectional plies to form a plurality of arms.

A rotor assembly is provided for an electric motor. The rotor assembly includes: a cylindrical magnet member having magnetization in both axial and radial directions, the magnet member being formed from a moldable magnetic material; and an output shaft receivable within the magnet member. An inner surface of the magnet member and an outer surface of the output shaft have complementarily-engagable interface elements thereon to prevent or limit dislocation of the magnet member and output shaft, and at least one of the interface elements is formed by overmolding of the magnet member and output shaft with the other of magnet member and output shaft.

The method of manufacturing a magnetic rotor unit comprises providing a composite magnetic rotor body. The composite magnetic rotor body comprises magnetic particles dispersed in a polymer resin. The composite magnetic rotor body has a hole. The method further comprises inserting a shaft into the hole. The outer diameter of the shaft corresponds to the inner diameter of the hole. The method further comprises heating of the shaft. By heating the shaft, the elevated temperature of the shaft surface preferentially induces the polymer resin from an inner surface of the hole to exude or sweat on to the shaft surface, so as to provide a bonding layer between the magnetic rotor body and the shaft. An apparatus for such manufacture, and a magnetic rotor unit manufactured by such method, are also provided. Such rotor units have wide application, and may for example be used in sensors, electromagnetic generators, pulse generators, motors, magnetic brakes and magnetic couplings.

A rotor for an electric machine includes a rotor assembly having an outer surface and including a plurality of poles with permanent magnets. A solid layer is formed on the outer surface of the rotor assembly and has an outer surface with a first coefficient of friction that is lower than a second coefficient of friction of the outer surface of the rotor assembly. The rotor includes an outer sleeve. The rotor assembly is press-fit into the outer sleeve.

Disclosed is a rotor for a compressible fluid pump, in particular a blood pump that can be introduced into a patient's body through a blood vessel; said rotor comprises one or more impeller elements, is compressible and expansible between an expanded state and a compressed state, is made at least in part of a fiber-reinforced plastic material, is provided for rotating about an axis of rotation, and is characterized in that in the expanded state of the rotor, a first percentage, i.e. more than 30%, in particular more than 50%, of the fibers runs substantially straight between the first end (10a, 11a, 13a) thereof lying closest to the axis of rotation and a second end lying further away from the axis of rotation. According to the invention, the rotor retains its shape very well even when subjected to repeated mechanical stress.

A rotor for use in a turbomachine includes a hub centered on a central axis and having a disk portion and a shaft portion and a blade extending outward from the hub. The hub and the blade together include a plastic substrate and metal plating disposed on at least apportion of an outer surface of the plastic substrate. The plastic substrate has a matrix material and fibers embedded in the matrix material. The fibers have a first coefficient of thermal expansion. The metal plating has a second coefficient of thermal expansion. The fibers are selected such that a bulk coefficient of thermal expansion of the plastic substrate at the outer surface of the plastic substrate substantially matches the second coefficient of thermal expansion of the metal plating.

There are provided a method and a device for manufacturing an iron core product, including: holding first and second inserts by first and second holding portions provided in a holding unit; and then displacing at least one of the first holding portion and the second holding portion such that a posture of the first insert corresponds to an opening of a first receiving portion provided in a first main surface of a first receiver and a posture of the second insert corresponds to an opening of a second receiving portion provided in the first main surface; thereafter inserting the first insert from the first holding portion into the first receiving portion and inserting the second insert from the second holding portion into the second receiving portion in a state where the holding unit is arranged to face the first main surface.

A rotor includes a plurality of rotor cores arranged in a vertical stack, an end plate having a specified roughness on a surface engaging the vertical stack, and a binder material bonding the end plate to the vertical stack of rotor cores. The specified roughness is configured to allow venting of air beyond the end plate and to prevent passage of resin beyond the end plate.

This method is for manufacturing a fan blade rotor which includes an annular rotation support ring around a rotary shaft, a permanent magnet provided alongside the rotation support ring in the radial direction, and a composite material for integrally binding the rotation support ring and the permanent magnet, the method including: a step S1 for arranging the rotation support ring and the permanent magnet side by side in the radial direction; steps S2-S4 for spirally winding, on the rotation support ring and the permanent magnet arranged side by side being as a core, the composite material being an uncured composite material including a reinforcement fiber impregnated with an uncured resin with the fiber direction of the reinforcement fiber set as a longitudinal direction; and a step for curing the resin included in the composite material.